CVE-2026-5039

Summary

TP-Link TL-WR841N v13 uses DES-CBC encryption in the TDDPv2 debug protocol with a cryptographic key derived from default web management credentials, making the key predictable if device is left in default configuration. A network-adjacent attacker can exploit this weakness to gain unauthorized access to the protocol, read debug data, modify certain device configuration values, and trigger device reboot, resulting in loss of integrity and a denial-of-service condition.

Affected Software

VendorProductVersion RangeStatus
TP-Link Systems Inc.TL-WL841N v130 < 0.9.1 Build 20231120 Rel.62366affected

Weaknesses

  • CWE-1394: CWE-1394 Use of default cryptographic key

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References